JPH017664Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cab suspension device for tiltably supporting the cab of an automobile, particularly a tilt cab type truck.

[Prior art]

A tilt cab type truck or the like is provided with a cab suspension device that supports the cab in a tiltable manner (for example, see Utility Model Application No. 58-95377). For example, as shown in FIG. 1, this device includes a hinge support 1 fixed to the front end of a cab frame 10.
1, a frame bracket 13 erected on the vehicle body frame 12, a suspension link 14 rotatably supporting the hinge support 11 and rotatably connected to the frame bracket 13, and a suspension link 14 and the vehicle body. A hydraulic cylinder 1 is provided with a coil spring 15 that is interposed between frames 12 and supports a suspension link 14, and is connected to a cab frame 10 and a vehicle body frame 12.
The cab 17 is configured to be tiltably supported in accordance with the expansion and contraction drive of the cab 6. When the cab 17 is tilted to a predetermined tilt angle, the cab frame 10
A tilt stopper 18 connected to the vehicle body frame 12 prevents the forward tilt angle of the cab 17 from exceeding a predetermined tilt angle.

However, in the case of a vehicle equipped with the suspension device shown in FIG. 1, the cab 17 is configured to prevent tilting of the cab 17 by a tilt stopper 18 and a hydraulic cylinder 16.
Since the suspension device is not provided with a mechanism for preventing the cab 17 from tilting, it is necessary to return the cab 17 to a substantially horizontal state when performing maintenance and inspection of the tilt stopper 18 and hydraulic cylinder 16. Furthermore, if the tilt stopper 18 or the hydraulic cylinder 16 fails when the cab 17 is tilted to a predetermined tilt angle, there is a risk that the cab 17 will fall forward. For this reason, there has been a need for something that can prevent the cab 17 from falling forward.

FIGS. 2 and 3 show that when the cab 17 is tilted, the cab frame 10 sinks due to the movement of the center of gravity during the tilt, and the cab 17 is tilted.
This figure shows the structure of a suspension device (Utility Application No. 57-97035) that was proposed to prevent the vehicle body from tilting to the left or right due to the increased degree of forward tilt of the vehicle. This device has a support arm 20 on a tilt axis 19.
In addition, a pedestal 21 is provided on the vehicle body frame 12, and when the cab 17 is tilted, the tip of the support arm 20 is configured to move while sliding on an arcuate slope 22 of the pedestal 21. Therefore, the load of the cab 17 is supported by the pedestal 21, so
It is possible to prevent the coil spring 15 and the like from sinking. Further, as in the device disclosed in Japanese Utility Model Application Publication No. 58-93575 or the device shown in FIGS. If provided, the support arm 20 and the pedestal 21 will engage when the cab 17 rotates to a predetermined tilt angle.
It is possible to prevent the cab 17 from tilting beyond a predetermined tilt angle.

[The problem that the idea attempts to solve]

However, in both of the cases disclosed in the above-mentioned Japanese Utility Model Application Publication No. 58-93575 and shown in FIGS. 2 and 3, the structure of the stopper is large and the number of parts increases, resulting in increased cost and weight. become a factor.

Furthermore, various parts are generally crowded around the suspension structure at the front end of the vehicle, and the front grill is also close together, so there is a very limited space, and from this point of view as well, it is difficult to provide a large stopper.

The present invention was devised to eliminate the above-mentioned drawbacks, and its purpose is to simplify the structure, reduce the number of parts, reduce weight, and enable the installation of a stopper mechanism even when space is limited. An object of the present invention is to provide a cab suspension device for an automobile that can prevent the vehicle from tipping forward.

[Means to solve the problem]

In order to achieve such an objective, the present invention has a hinge support fixed to the front end of the cab frame, a frame bracket erected on the vehicle body frame, and a hinge support that is rotatably supported. A cab suspension device for an automobile that includes a freely connected suspension link and a coil spring that is interposed between the suspension link and the vehicle body frame and supports the suspension link, and supports the cab in a tiltable manner. The hinge support is integrally provided with a stopper that comes into contact with the upper surface of the suspension link to prevent the cab from tilting when the cab's forward inclination angle exceeds a predetermined tilt angle.

[Effect]

If the hinge support is provided with a stopper that comes into contact with the upper surface of the suspension link when the cab forward tilt angle exceeds a predetermined tilt angle, the stopper integrated with the hinge support will It comes into contact with the upper surface of the suspension link and prevents further tilting of the cab.

〔Example〕

Hereinafter, a preferred embodiment of the present invention will be described based on FIGS. 4 and 5.

The cab suspension device in this embodiment is the same as the cab suspension device shown in FIG. 1 except for the configuration of the hinge support 11, so the same parts are denoted by the same reference numerals. , and their explanation will be omitted.

That is, in order to prevent the cab 17 from falling forward with a simple structure, in this embodiment, the stopper 23 is integrally fixed to the hinge support 11 by welding. This stopper 23 and the hinge support 11 are rotatably connected to the suspension link 14 via a pin 24. or,
The tip of the stopper 23 protrudes from the end 11a of the hinge support 11, and the angle between the end 23a of the stopper 23 and the upper surface of the suspension link 14 is larger than a predetermined tilt angle. That is, the end portion 23a is configured to abut the upper surface 14a of the suspension link 14 when the forward tilt angle of the cab 17 exceeds a predetermined tilt angle, for example, 47 degrees. Therefore, even if the tilt stopper 18 and the hydraulic cylinder 16 fail, the stopper 23 contacts the suspension link 14 to prevent the cab 17 from tilting, thereby preventing the cab 17 from falling forward. . Therefore, even when performing maintenance and inspection of the tilt stopper 18 and the hydraulic cylinder 16, the cab 17
This can be done while leaning forward.

In this manner, in this embodiment, by fixing the stopper 23 to the hinge support 11, the cab 17 can be prevented from falling forward with a simple structure.

Furthermore, the stopper 23 is not limited to the one in the embodiment described above, but may also have a shape as shown in FIG. As long as it comes into contact with the upper surface 14a of the link 14 and prevents the cab 17 from tilting, it is possible to prevent the cab 17 from tipping forward as in the previous embodiment. Furthermore, the stopper 23 is not limited to being welded to the hinge support 11, but may be provided integrally with the hinge support 11.

[Effect of idea]

As explained above, according to the present invention, the hinge support is integrally provided with a stopper that comes into contact with the upper surface of the suspension link to prevent the cab from tilting when the cab's forward inclination angle exceeds a predetermined tilt angle. The structure is simplified, the number of parts is reduced, and the cost and weight can be reduced. Moreover, since the stopper is a small piece that is integrally installed with a slight protrusion from the hinge support, various parts are crowded around the suspension mechanism at the front end of the vehicle, and the front grill is also close together, making space extremely constrained. Even if there is a problem, the stopper mechanism can be installed and the cab can be prevented from tipping forward, which is an excellent effect.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a conventional cab suspension device, Figure 2 is a side view of the main parts of the cab suspension device to prevent the cab from sinking when the cab is tilted, and Figure 3 is a front view of the same as in Figure 2. 4 and 5 show an embodiment of the present invention,
FIG. 4 is a front view, FIG. 5 is a side view, and FIG. 6 is a diagram for explaining another structure of the stopper according to the present invention. 10... Cab frame, 11... Hinge support, 12... Body frame, 13... Frame bracket, 14... Suspension link, 14
a...Top surface, 15...Coil spring, 17...
...Kiyabu, 23...Stoppa.

Claims (1)

[Scope of utility model registration request] A hinge support fixed to the front end of the cab frame, a frame bracket erected on the vehicle body frame, a suspension link that rotatably supports the hinge support and is rotatably connected to the frame bracket, and a suspension link. In an automobile cab suspension device that includes a coil spring that is interposed between a suspension link and a vehicle body frame and supports the suspension link, and that supports a cab in a tiltable manner, the hinge support has a predetermined forward tilt angle of the cab. A cab suspension device for an automobile, characterized in that a stopper is integrally provided to prevent tilting of the cab by coming into contact with the upper surface of the suspension link when the tilt angle is exceeded.